The coming features may help. They are in "early access beta testing" with selected apps on request.
https://www.quickbase.com/blog/august-2018-release-notesType-ahead search picker
We�re working on a type-ahead search for records that will reduce time and frustration for those with large datasets. With our current record picker, you have to scroll through up to 1,000 records to find the one you want. With our new record picker, you can search by typing to narrow down your results.
Because our new record picker doesn�t support conditional drop-downs, we�re looking for early access participants that don�t have conditional drop-downs. We�re also looking for individual apps rather than realms to test out this feature.
